Good Price Industrial Grade Hydroxypropylmethylcellulose/HPMC CAS 9004-65-3
Product Description
Hypromellose, also known as hypromellose, is a type of non-ionic cellulose mixed ether. It is a semi-synthetic, inactive, viscoelastic polymer commonly used as a lubricant in ophthalmology, or as an excipient or excipient in oral medications.
Appearance: White or off-white fibrous or granular powder
Stability: The solid is flammable and incompatible with strong oxidants.
Carbonization temperature: 280-300ºC
Apparent density: 0.25-0.70g/cm3 (usually around 0.5g/cm3), specific gravity 1.26-1.31.
Discoloration temperature: 190-200ºC
Surface tension: 2% aqueous solution is 42-56dyne/cm
Solubility: soluble in water and some solvents, such as ethanol/water, propanol/water, etc. in appropriate proportions. Aqueous solutions are surface active. It has high transparency and stable performance. Products of different specifications have different gel temperatures and solubility changes with viscosity. The lower the viscosity, the greater the solubility. The performance of HPMC of different specifications has certain differences. The dissolution of HPMC in water is not affected by the pH value.
As the methoxy group content of HPMC decreases, the gel point increases, the water solubility decreases, and the surface activity also decreases.
HPMC also has thickening ability, salt-tolerant low ash powder, pH stability, water retention, dimensional stability, excellent film-forming properties, and a wide range of enzyme resistance, dispersion and adhesion properties.
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